(in your home directory):
curl -sL https://deb.nodesource.com/setup_12.x -o nodesource_setup.sh
sudo apt install nodejs -y
$ nodejs -v
v12.11.1
$ npm -v
6.11.3
in your project directory:
Install Jest using: npm install --save-dev jest
Install Babel using: npm install --save-dev babel-jest @babel/core @babel/preset-env
Install ESLint using: npm install --save-dev eslint
{
"scripts": {
"lint": "./node_modules/.bin/eslint",
"check-lint": "lint [0-9]*.js",
"dev": "npx babel-node",
"test": "jest",
"full-test": "./node_modules/.bin/eslint [0-9]*.js && jest"
},
"devDependencies": {
"@babel/core": "^7.6.0",
"@babel/node": "^7.8.0",
"@babel/preset-env": "^7.6.0",
"eslint": "^6.4.0",
"eslint-config-airbnb-base": "^14.0.0",
"eslint-plugin-import": "^2.18.2",
"eslint-plugin-jest": "^22.17.0",
"jest": "^24.9.0"
}
}
module.exports = {
presets: [
[
'@babel/preset-env',
{
targets: {
node: 'current',
},
},
],
],
};
module.exports = {
env: {
browser: false,
es6: true,
jest: true,
},
extends: [
'airbnb-base',
'plugin:jest/all',
],
globals: {
Atomics: 'readonly',
SharedArrayBuffer: 'readonly',
},
parserOptions: {
ecmaVersion: 2018,
sourceType: 'module',
},
plugins: ['jest'],
rules: {
'max-classes-per-file': 'off',
'no-underscore-dangle': 'off',
'no-console': 'off',
'no-shadow': 'off',
'no-restricted-syntax': [
'error',
'LabeledStatement',
'WithStatement',
],
},
overrides:[
{
files: ['*.js'],
excludedFiles: 'babel.config.js',
}
]
};
Don’t forget to run $ npm install
when you have the package.json